Re: FAILED: patch "[PATCH] mm/damon/core: disallow max < min damos filter range arguments commit" failed to apply to 7.3-stable tree

[SJ Park <sj@kernel.org>]

On Sat,  7 Nov 2026 05:04:27 -0500 Sasha Levin <sashal@kernel.org> wrote:

> The patch below does not apply to the 7.3-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@vger.kernel.org>.
> 
> To reproduce the conflict and resubmit, you may use the following commands:
> 
> git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-7.3.y
> git checkout FETCH_HEAD
> git cherry-pick -x 1bfb9384ae0ed52d61eb601b655014b7815ff849
> # <resolve conflicts, build, test, etc.>
> git commit -s
> git send-email --to '<stable@vger.kernel.org>' --in-reply-to '20261107050426-failed-7.3-1bfb9384ae0e@kernel.org' --subject-prefix 'PATCH 7.3.y' 'HEAD^..'
> 
> Thanks,
> Sasha
> 
> ------------------ original commit in Linus's tree ------------------
> 
> >From 1bfb9384ae0ed52d61eb601b655014b7815ff849 Mon Sep 17 00:00:00 2001
> From: SJ Park <sj@kernel.org>
> Date: Mon, 14 Sep 2026 07:23:21 -0700
> Subject: [PATCH] mm/damon/core: disallow max < min damos filter range
>  arguments commit
> 
> damos_commit_filter_arg() receives range arguments for a few types of
> DAMOS filters.  It allows any range including max < min range.  It is fine
> for the logic, but makes no sense to support it.  Actually DAMON sysfs
> interface is doing the validation on its own.  To avoid duplicated
> validations in multiple DAMON API callers, it would be better to do the
> validation in the core layer.  Add a validation of the given range.
> 
> Link: https://lore.kernel.org/20260914142327.92510-5-sj@kernel.org
> Signed-off-by: SJ Park <sj@kernel.org>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> Cc: Brendan Higgins <brendan.higgins@linux.dev>
> Cc: David Gow <davidgow@davidgow.net>
> Cc: Usama Arif <usamaarif642@gmail.com>
> Cc: <stable@vger.kernel.org>

Including this, five DAMON patch cherry-pick failures [1,2,3,4] for 7.3.y are
reported last night

The patchex except the last one [4] don't Cc: stable@ and look like not
essential hotfixes.

Those are refactoring [1,2] or a very minor fix [3] that doesn't really impact
users.  Those are not built in porting-friendly way because those were not
meant to be hotfixes.  To port those, no small amount of refactoring or porting
of more dependencies are expected.

I don't mind porting non-Cc: stable@ DAMON patches to stable kernels.  And I'm
happy to help doing that.  But I'm not quite sure if this is indeed what you
want, or picked by a mistake.  Could you please confirm?

[1] https://lore.kernel.org/20261107050429-failed-7.3-1d2397b2c414@kernel.org
[2] https://lore.kernel.org/20261107050431-failed-7.3-cec08aad3def@kernel.org
[3] https://lore.kernel.org/20261107050434-failed-7.3-af19aff38d6f@kernel.org
[4] https://lore.kernel.org/20261107050537-failed-7.3-5695abc4e742@kernel.org


Thanks,
SJ

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